I am looking for any assistance in finding the experimental films of Kenneth Macpherson (and his wife Winifred Bryher). Wing Beat (1927), Foothills (1928), Monkey's Moon (1929) and Borderline (1930) are of interest. My research suggests that only Borderline is extant, however I have not found where to obtain it. I am interested in any excerpts if the other three that seem unnavailable.
Thank you!